Lux by Jennifer L. Armentrout
Lux Series

When Katy's forced to move into a one-traffic-light town somewhere in West Virginia, she thinks her life is going to be boring. She discards that idea pretty quickly after meeting her new neighbours: Dee is sunshine and her new bestie, Daemon however... He's hot. He's smart. And an ass. But as time passes, Katy begins to realise that there's more to the Blacks that the eye meets: They're aliens. Suddenly, Katy finds herself connected to the one person she absolutely hates... and in the middle of an ancient war.
Extras

The story of the lost brother - and the girl in whose tracks Katy will follow.
The new neighbour means trouble. Especially since neither Dee nor Daemon himself can stay away from her - Katy is kick-ass and sassy... but she's also a risk. And she will bring the Arum.
Hunter is pissed. He does NOT want to play baby sitter for some human woman. Ever. But Serena proves to be a surprise: Suddenly, Hunter finds himself ready to protect her from anyone - even himself. - This one's adult, rest YA.